Niin'Fiier, Displaced and Free

Convoke, Haste
You must play this card if able. At the end of
your turn, if this card is in play, pay {g/u},
return it to your hand and gain 2 life. If this card
was removed from play this turn, pay {g/u} and
shuffle this card into your library. If you cannot
pay {g/u}, pay 2 life instead. If you gained life this
turn, pay 4 life instead.
"Don't worry about breaking the rules. Just change
them, bend them to your own tempo."